HTML Code

<!DOCTYPE html>
<html>
<head>
  <title>CSS overflow-block Scroll Example</title>
  <style>
    body {
      font-family: system-ui, sans-serif;
      padding: 1.5rem;
      text-align: center;
    }

    @media (overflow-block: scroll) {
      body {
        background-color: #dbeafe;
      }
    }
  </style>
</head>
<body>
  <h1>Scroll Device Demo</h1>
  <p>Light blue background when block overflow is scrollable.</p>
</body>
</html>

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CSS overflow-block - Scroll Background